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How to Lock Secret Diary With Passcode on iPhone

iOS 18 Face ID lock and Hidden folder · Berce Alin · checked November 2026

Time needed
4 taps
Needs iOS 18 or later

Works for Secret Diary With Passcode whether or not it has its own passcode. No download needed.

Short answer

Touch and hold Secret Diary With Passcode's icon, tap Require Face ID, then confirm. On iOS 18 and later that puts Secret Diary With Passcode behind Face ID, Touch ID or your passcode; choose Hide and Require Face ID instead to move it into App Library's Hidden folder as well.

Lock Secret Diary With Passcode with Face ID

  1. Find Secret Diary With Passcode on your Home Screen or in App Library.
  2. Touch and hold the icon until the quick-actions menu opens.
  3. Tap Require Face ID (or Require Touch ID / Require Passcode, depending on your iPhone).
  4. Tap Require Face ID again to confirm. Secret Diary With Passcode now asks for authentication every time it opens.

To test it, close Secret Diary With Passcode from the App Switcher and open it again. You should see the Face ID prompt before any content appears.

Hide Secret Diary With Passcode in App Library

  1. Touch and hold Secret Diary With Passcode's icon and tap Require Face ID.
  2. Choose Hide and Require Face ID instead of Require Face ID.
  3. Confirm. The icon leaves your Home Screen and moves to the Hidden folder at the bottom of App Library.
  4. To open it later, swipe to App Library, tap Hidden and authenticate.

Hiding also locks the app. To undo either, touch and hold the icon again and choose Don't Require Face ID.

Why lock Secret Diary With Passcode?

Secret Diary With Passcode's privacy label lists location — the kind of data you would not want on screen if someone borrows your unlocked phone. Journals collect your private thoughts, moods and often your location and photos. A lock screen inside the app is not the same as encryption of the synced entries.

Lifestyle apps cover family, home and personal organisation, and often combine location, contacts and photos in one place.

A lock answers one question — who can open the app on this iPhone. It does not change what Secret Diary With Passcode sends to its developer; for that, see Secret Diary With Passcode's full privacy report.

What the lock does and does not do

It does

  • Ask for Face ID, Touch ID or passcode every time Secret Diary With Passcode opens
  • Hide message previews in notifications
  • Keep Secret Diary With Passcode's content out of Spotlight and Siri suggestions
  • With Hide, remove the icon from the Home Screen

It does not

  • Stop someone who knows your passcode
  • Encrypt or change how Secret Diary With Passcode stores data
  • Sync to your iPad or other devices
  • Remove Secret Diary With Passcode from purchase history or Screen Time reports

Don't see Require Face ID?

  • Update to iOS 18 or later in Settings › General › Software Update.
  • Make sure a passcode is set in Settings › Face ID & Passcode; the lock needs one.
  • Some Apple apps (Settings, Calculator, Camera, Maps, Find My, Clock) cannot be locked or hidden.
  • If your iPhone is managed by work or school, the option may be restricted.

Other settings worth checking for Secret Diary With Passcode

  1. Tracking

    Settings › Privacy & Security › Tracking. If “Allow Apps to Request to Track” is off, apps cannot ask, and they are told to treat you as having declined. You can also turn it off for this app alone.

  2. Location

    Settings › Privacy & Security › Location Services › Secret Diary With Passcode. Choose While Using or Never, and switch off Precise Location if a city-level answer is enough.

  3. Notifications

    Settings › Notifications › Secret Diary With Passcode › Show Previews: When Unlocked keeps message and account details off the Lock Screen.

Secret Diary With Passcode's full privacy label

App Privacy label Developer-reported · checked November 1, 2026
Used to track you
4types
Linked to you
0types

None declared

Not linked to you
4types

Is Secret Diary With Passcode safe? Every data type explained →

Lock these apps too

After you lock Secret Diary With Passcode

Tick what you have done
Tick each step as you do it on your iPhone.

Done. You have applied every control the label points to.

FAQ

Does Secret Diary With Passcode have its own passcode?
Some apps offer an in-app PIN or biometric lock in their settings. The App Store privacy label does not say whether Secret Diary With Passcode does; the iOS 18 lock works regardless.
What happens to Secret Diary With Passcode's notifications when it is locked?
Locked and hidden apps do not show message previews or content in notifications, and their content does not appear in Spotlight search or Siri suggestions.
Can someone who knows my passcode open a locked app?
Yes. If Face ID fails, the lock falls back to your device passcode. Keep the passcode private if the lock matters to you.
Is a locked Secret Diary With Passcode encrypted?
The lock controls who can open the app on this iPhone. It does not change how the app stores or syncs data. Encryption depends on the developer and on your device passcode.
Why can't I see the Require Face ID option?
You need iOS 18 or later. Some Apple apps such as Settings, Calculator, Maps and Camera cannot be locked or hidden.
Does hiding Secret Diary With Passcode remove it from my purchase history?
No. Hidden apps still appear in App Store purchases and in Settings › Apps, and Screen Time reports still include them.

Is Secret Diary With Passcode safe? Full privacy report →Does Secret Diary With Passcode track you? →Lock an app: A–Z →All lifestyle apps →

Facts on this page come from Apple: lock or hide an app on iPhone, as reported by the developer. Checked November 2026. How we collect data · Report a correction